Browse properties. View source. Log in. Request account. Jump to: navigation , search. This page was last edited on 10 April , at Farnsworth transmitted an image through the first fully functional all-electronic image pickup device video camera tube , the image dissector. Farnsworth also invented the first fully functional and complete all-electronic television television system.
Farnsworth was 13, he envisioned a contraption that would receive an image transmitted from a remote location—the television.
The image dissector was an early all-electronic television camera tube invented by Philo Farnsworth. Most experimental television systems in the s and s made use of an electromechanical system , usually a Nipkow disk combined with a single photoelectric cell for scanning an image and creating an electrical output. A similar device operating in reverse was used to project the image onto the picture screen.
In , Philo Farnsworth, a teenage farmboy in Utah, discovered that one could use a cathode ray tube to generate an electrical television signal without the need for a mechanical scanning device. The image dissector focused an image onto a layer of caesium oxide, which emitted electrons proportional to the intensity of the light. Only a small portion of the electron stream passed through an aperture to the electron collecting plate, representing a single point of the television image.
Electromagnets were used to focus and deflect the electrons so that the total image was sequentially scanned. Farnsworth's image dissector was successfully demonstrated and patent applications were made in Use of this web site signifies your agreement to the terms and conditions. Philo T. Farnsworth was one of the most prolific inventors in television history, with over 75 important inventions in his name.
Born in in Utah, he conceived an all-electric system of television while only 15 years of age.
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